- Interface
for the TDM bus and packet bus and fiber optic links interconnecting
cabinets.
- Used
in a Port Network (PN) between a PN and another PN in a direct-connect
system and between a PN and an SNI in a switch node carrier in
a CSS-connected system.
- Provides
control channel applications and time-slot interchanging between
the PPN and EPNs.
- Carries
circuit switched data, packet-switched data, network control,
timing control, and DS1 control.
- Used
in SREPN (Survivable Remote Expansion Port Network), R& or
later SI.
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